Typically, fish stocking is mostly done by trucks with holding tanks that carry the fish to a lake or stream, where they are then dumped into the water via pipes.

In centuries’ past, horses were used to pack in metal milk cans filled with fish and water to more remote areas. But by the 1950s, small airplanes became the preferred method, one that is still utilized today, UDWR biologist Matt McKell explained in a blog post.

Fish rained down from the sky in northern Mexico last year, though this instance wasn’t intentional. Small fish accompanied a light rain in Tampico in September.

According the U.S. Library of Congress, it's a phenomenon that has been reported since ancient times. Scientists believe that tornadoes over water — known as waterspouts — could be responsible for sucking fish into the air where they are blown around until being released to the ground.